in cpp/src/util.cpp [27:43]
std::string os_name() {
#ifdef _WIN32
return "Windows32";
#elif _WIN64
return "Windows64";
#elif __APPLE__ || __MACH__
return "MacOS";
#elif __linux__
return "Linux";
#elif __FreeBSD__
return "FreeBSD";
#elif __unix || __unix__
return "Unix";
#else
return "Other";
#endif
}